Dwight;

I would suggest you group the films based on image quality.

Hopefully most of the diazo copies are good enough for a 200dpi - bi-tonal
scan.

If not reduplicate the masters and/or 300dpi - grey-scale would be the next
step.

Sending out the silver masters could be risky but if you need the images
converted. Scan on site with a rental scanner or have the vendor come on
site?

Regards;
-- 
John R Glover
707-773-1257
[log in to unmask]
www.linkedin.com/in/johnrglover
On Wed, Mar 17, 2010 at 10:00 AM, WALLIS Dwight D <
[log in to unmask]> wrote:

> Hi, folks - we are looking at the conversion of a fairly large amount of
> 16mm and 35mm microfilm, as well as 105mm microfiche to TIFF images.
> I've found some good examples of specifications on the internet, for
> example, from the Library of Congress. Outside of our microfiche - which
> is fairly consistent COM - I anticipate film quality that varies
> considerably in density, splicing practices, and reduction ratio. The
> office I am facilitating this for wants to send out only their diazo
> copies for scanning. We are looking at negative > positive scans, mostly
> bi-tonal, but with some potential gray scale issues as well (I'm not
> entirely sure what we are scanning yet, but believe some of it is
> hand-written).
>
>
>
> I prefer to send out the diazos myself, but wonder what kinds of quality
> issues we might encounter in doing so. Is there anyone who can comment
> on this, or perhaps point me to any standards or guidelines on the
> subject?
>
>
>
> Also, if you have sent out silver originals for scanning outside of your
> immediate geographic area, what kind of shipping/insurance arrangements
> did you make? Or, is this simply too risky?
>
>
>
> Dwight Wallis, CRM
>
> Records Administrator
>
> Multnomah County Records Management Program
>
> 1620 SE 190th Avenue
>
> Gresham, OR 97233
>
> phone: (503)988-3741
>
> fax: (503)988-3754
>
> [log in to unmask]
>
>
>
>
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